Totally agree my BB spends its day on charge, at home/car. And when I'm asleep, according to RIM lithium Batterys love it! And you can't overcharge them. The worst thing is to let them regularly run right down to around 15% or less. I think. There's still a lot of disinformation as to lithium and the older nicad types. Lithium batteries require no breaking in, just as you said keep them 'topped off' It is good practice once a month to run the device down to 20/15% but this just to help calibrate the Battery meter